This name is a synonym of Symphyotrichum grandiflorum (L.) G.L.Nesom.
The record derives from TICA
(data supplied on 2012-02-11)
which reports it as a synonym and as an illegitimate name (record 2E941CE4-DB28-4803-8B52-7FC4C14FAEEE) with original publication details: 293 1840.
This name was in version 1 of The Plant List, record gcc-88587, and has not been changed.